Permutation-padlock



H. N. TENNILLE.

' PERMUTATION PADLOCK. 'APPLICAIION EILED APR. 18. 1911.

MRO, I I

INVENTOR l h'r'ry /V. 'Tnnille WITNESSES [WW BY 2 ATTORNEY HARRY 1v.rEnnILLnoF DUMBARTON; VIRGINIA."

' PEaMnT TroN-P DLocK.

Application filedApril 18, 1917. 7 Serial N0.163, 003.

To all whom it may concern: 7

Be it known that I, HARRY N. TE N LLE, a citizen of 'the UnitedStates,residing at Dumbarton, in the county of Henrico and State ofVirginia, have invented certain new and useful Improvements inPermutation- Padlocks, of which the following is a specification. v I eThis invention relates to permutation padlocks. I

The primary, object of the invention isto provide a permutation padlockprovided with a plurality of annular tumblers asso ciated with animproved locking mechanism whereby the lock shackle-may bereleased onlyupon placing thetumblersina certain relative position, butwhich willpermit the shackle to be placed into operative position, after beingreleased, regardless of the position of the tumblers. Another object ofthefinvention is to provide a permutation padlock having a looking 'boltpivotally suspended from the shackle and resiliently held in operativeposition, whereby tampering withthe locking mechanism, through themedium of twisting or pulling the shackle will be-prevented.

Another object of the invention isto provide a plurality ofrotatable'tumblers carrying'characters to be combinedfor forming apredetermined combinatiomthe tumblers being associated with a. lockingbolt within the barrel of the lock, whereby the same may be releasedupon the proper combination of characters being formed.

A further object of this-invention isthe provision of a permutationpadlock which consists of comparatively few parts and is simple inconstruction, but durable and well adapted to withstand the rough usageto which devices of this character are ordinarilysubjected. 1 7

For a full description of the invention and the advantages and meritsthereof, ref? 'erence' is to be had to the following description I andthe accompanying drawings, wherein is illustrated the preferred form ofmy invention, in which ;1

1 Figure 1 is a side elevation, of the flock constructed in accordancewith my invention. 7

Fig.2 is a "longitudinal section therethrough.

shackle and locking bolt.

' I Specification of Letters Patent. I

- Fig.3 is a detail perspective view of the Patented auneiiiezo.

Fig. 4 is a detail perspective view of di of the locking tumblers. V p

v Fig- 5is -a transverse section on the, line 5 5nof Fig. 2. y,

-Fig. 6 is a similar, I

looking bolt in unlocked position. w v 7 Referring to thedrawing,wherein is illustrated the preferred form of my invention, and n whichlike numerals of reference indicatecorresponding 7 parts throughouttheseveral views, the barrel 1 is of cylindrical formation and the sameconsists of the relatlvely large head 2 integrally connected with thecylindrical neck 3, the latter being of ,a diameter considerably lessthan the diameter of the head. A centrally located screw threaded recesslreceives the screw threaded stud 5,-carriedby the cap 6 which forms theend of the barrel opposite to the head 2 and whichis of the same generaloutline as the head. w

Rotatably mounted upon'the neck is a plurality of annular tumblers 7,8,9 and 10, the same being'of identical construction, and slightly largerin diameter than the outer diameter of the head2 or cap 6.

These tumblers are in close frictional contact as shown by Figs. 1 and 2of the drawing and their outer peripheries are provided with a pluralityof characters, shown in the drawing as circumferentially spaced letters.One of these tumblers is-shown in detailin Fig. 4 of-the drawing, andit'will be noted that thesame is provided'with' an interior annulardepressiongll, thereby forming a relatively thin annular flange 12. Theflange 12 in each tumbler has anotch 13,- the'bottomof which is flushwith the annular wall of the depression. It will be obvious, therefore,that when the notches 13 in all of the tumblers are alined, alongitudinal passageway will be formed through section showing the A snrOFFICE;

the superposed tumblers. The characteron with the notch in the tumblerwill, of course,

v each tumbler which is'inradial alinement the combination for the'purpose'of alining the notches. For instance, the notches in thetumblers 7, 8, 9v and 10 will be opposite the characters L, O, C, and K,respectively,

thereby forming the word look as the key-word for forming thecombination,

whereby the notches. may be alined for the purpose of unlocking thelook, It will be understood, of, course, that any other combinationoffletters may be employed to form the lock combination. a

The head 2 is provided with. a cavity 14 which mergesinto a longitudinalgroove 15 formed in the neck 3. The cavity-14 also communicates with anopening 16, the latter opening receiving one, end of the shackle 17.Ifhe'oppositeend ofthe shackle is received in a recess 18, formed in thetopof 10 the head 2, when the shackle is in locked positionk The end ofthe shackle which projects through the-"opening 16 is slightly longerthan the opposite end of the shackle so that its terminal is disposedconsiderably within the cavity 14;. Tothis end of the shackle, a link 19is pivotally connected v andf the o'pposite'end of thelink is fixedlyconnected to a locking bolt 20. The locking-bolt is thereby suspendedfrom the end of'th'e shackle, and is permitted to be extended throughthe groove 15. The pivotal connection of the link with the shacklepermits a rotarymovement ofthe locking bolt around the end" of theshackle, the latter acting as the axis jfor'the locking bolt. The cap 6has a recess 2l in communication with the groove 15, so that the end ofthe lockingbolt maybe projected into the re-' cess 21, when the shackleis in locked position. It will be noted, however, that the distance thelocking bolt projects into the recess 21 is substantially equal to thedistance that the short end of the shackle projectsl into the recess'18,so that when this end of the shackle is withdrawn fromthe recess 18, theend of the,locking bolt will also be withdrawn from its recess 21.

Referring particularly to Fig. 3 of the drawing, it will be noted thatthe locking bolt is provided with tangential recesses 22,

longitudinally spaced thereby forming a series of equally spaced apartbits 22', the faces of which arebeveled as clearly shown by Fig. 2of thedrawingp Extending into the neck 3, and communicating with the groove 5,is an orifice 23, the same receiving one end of a coil expansion spring24 adapted to engage the adjacent side of the lockingbolt 20, thusforcing the locking bolt into engagement with the inner edges of theannular tumblers at the points where they pass through the groove 15, sothat when the locking bolt is in locked positiomthe bits 22- will extendinto the annular recesses in the tum blers and engage the fianges12,thereby preventing withdrawal of the locking bolt and consequentlypreventing withdrawal of the shackle. When the tumblers are rotated,however, and the combination is set so that the notches 13 will bealined, the locking ,bolt may be drawn through the passageway, thusformed to permit the shackle to be released from therecess 18. Thespring, of course, holds the locking bolt in close engagement with thetumblers but permits the bolt to be longitudinally moved so that theshackle. may be released. By virtue of the 'beveled'faces of the bits22,the bolt may be thrust back into locked position even though thetumblers have been turned so that-the notches are in staggered relation.

The beveled faces will simply slide over.

the edges ofthe tumblers against the compression of the spring, whichlater will force the bits into the recesses to obtain the lockedposition. V

It is to be observed,also, that the extended end of the locking-boltreceived in the recess 21, prevents the removal of the" cap 6 byunscrewing the stud 5, until after the shackle has been released and thebolt withdrawn from the recess'21. Suitable, longitudinally alinedmarks,designated by the arrows in Fig. 1, will be placed upon thesurface-of the barrel and cap 6 to permit the operator. to determine atwhich point the characters are to be alined to form the combination. V V

A change in the combination is easily ac complished by unlocking thelock and unscrewing the stud 5, thus removing thecap 6. The tumblers canthereby be quickly removed from the neck 3 and replaced in any desiredorder to change the combination.

From the foregoing it will be'observed that a very: simple and durablelock has been provided, the details of which embody the preferred form.I desire it to be-un derstood, however, that slight changesin the minordetails of construction may be made without departing from the spirit ofthe invention or the scope of the claim hereuntoappended.

"I claim: Y

A look comprising a cylindrical barrel,"

having a restricted neck: andequipped with a head at one end andprovided with a removable cap at its opposite end, a plurality ofannular members rotatably mounted on the neck and held againstdisplacement ceived in the said recess and provided with a link,pivotally connected to the end of the shackle and adapted for lateralswinging movement in the said cavity, a locking bolt attached to one endof the link and disposed to engage and disengage the said annularmembers as the said link is laterally swung in thesaid cavity, a springele- .180

ment having one end engaged with the said locking-bolt to normally urgeit into engagement with the said annular members, the portion of thelocking bolt thus engaged being provided with bits having flat surfacesadapted to engage the annular members to prevent Withdrawal of thelocking bolt and beveled surfaces to facilitate insertion of the lockingbolt, each of the said annular members being provided With a notchadapted for alinement when the annular members are in a predeterminedposition for providing a space whereby the said bits may bedisengagedfrom the annular members to permit withdrawal of the saidlocking bolt.

In testimony WhereofI afliX my signature in presence of two Witnesses.

HARRY N. TENNILLE.

Witnesses:

B. O. ANDREWS,

M. W. MOCLINTOOK.

